[38.04] Sudden disappearances of filaments and their relation with Coronal Mass Ejections

S. Pojoga, F.R. Crawford, T.S. Huang (Prairie View Solar Observatory)

The results of a statistical study of sudden disappearances
of solar prominences and filaments observed between January
1 and December 31, 2001 are presented. Our study
concentrates on identifying different types of
disappearances, while also performing a separate correlation
analysis with CMEs. Three classes of events are considered:
eruptive (all or some prominence plasma escape the solar
surface), active (exhibit important plasma motions but with
no portion of the prominence appearing to escape the solar
gravitational field) and vanishing (vanish in place, with
minor motions or configuration changes). For each type of
event we determine the relationship with CMEs detected from
data obtained by LASCO C2 and C3 coronographs and other
associated coronal activities from EIT Fe XII 195A data. Our
results indicate that the different types of disappearances
exhibit a different correlation with CMEs, i.e. the eruptive
disappearances are associated with CMEs, while the other
types are not. The data also shows that the results are
affected by the size of events and their relative position
with respect to the center of the solar disk. This research
was supported under Air Force Office of Sponsored Research
grant F49620-02-1-0345.